一John and l will celebrate our fortieth wedding anniversary next month．
一Oh，（）。

Classification of vowels is made up of the following EXCEPT（）。

A.the openness of the mouth
B.the position of the tongue
C.the shape of the tip
D.the width of the vowels

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You’ll find taxis waiting at the bus station，（）you can hire to reach your host family．

A.which
B.when
C.where
D.As

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